Polishing machines



FIG. 1 is a perspective view of the polishing machine design of the present invention;

FIG. 2 is a side view thereof;

FIG. 3 is an opposite side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front end view thereof; and,

FIG. 7 is a rear end view thereof. 

CLAIM The ornamental design for polishing machines, as shown and described. 